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I'm assuming there's some sort of transpiler to brainfuck? I just cannot stomach the idea that that was written by hand somehow....

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Usual strategy is to use a macro assembler and lots of macros to build up some civilized things like stacks and subroutines. But there are also several high level (ish) languages that have compilers to BF.

https://esolangs.org/wiki/Brainfuck_code_generation

https://en.wikipedia.org/wiki/Brainfuck

> Although Brainfuck programs, especially complicated ones, are difficult to write, it is quite trivial to write an interpreter for Brainfuck in a more typical language such as C due to its simplicity. There even exist Brainfuck interpreters written in the Brainfuck language itself.

The parent comment was about a transpiler targeting brainfuck, not an interpreter. Writing a brainfuck interpreter (or compiler to x86/etc) is indeed trivial... writing a compiler targeting brainfuck is another beast entirely.

You're right of course. Although I guess some do exist:

https://github.com/arthaud/c2bf https://github.com/felko/bfpy

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